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How large will you let the tree get in its space? I wouldn't imagine a small tree would do well trying to hold a several-pound fruit.
You can always strip the leaves from nodes you want blooms from. You should allow blooms only on the branch portions that can support a several pound fruit without snapping, as many cherimoya varieties are several pounds, with some like sabor being notable exceptions.
I'm not a huge fan of dealing with live plants myself, so I prefer artificial flowers. Thankfully, there are lots of great options out there that aren't inferior in quality and beauty to real ones but don't require so much time for care.